Saturday, January 24, 2009

Blustery January

It has not been a good month for astrophotography. The thing about the winter months is that when you get clear skies, it is usually after a cold front moves through. That almost always introduces winds, and usually winds flowing at a pretty decent clip. When you do get a night with clear skies and no wind, the problem then becomes radiative cooling of the surface of the earth. This causes the waves of heat that you see in the summer over hot asphalt or sand. The seeing is bad under these conditions, and in astrophotography, stars show up as ill-defined blobs. So, alas, I will patiently wait for a good, clear, still night to try for more night images..